Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh le » thanh le, hanh ve, hanh de
y nang » ky nang, ly nang, v nang
le cau » ke cau, le mau, le cap
luc va » duc va, tuc va, loc va
le cua » ly cua
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu ((le cau) OR (ket cau)) luc va hanh le cua tu~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ((le cau) OR (ket cau)) luc va hanh le cua tu*.